HP 8559A Operation And Service Manual page 96

PERFORMANCE TESTS
4-26. DISPLAY FIDELITY (Cont'd)
Attenuator D V M
Setting Reading
0
10
20
30
40
50
60
70
offset recorded in step 2.
Attenuator D V M
Setting Reading
8. After recording DVM readings for step attenuator settings from 0 dB through 70 dB, calculate each
Corrected DVM Reading by algebraically subtracting offset recorded in step 2. Record results in Table
4-16 (see sample computations).
9. Algebraically subtract corresponding Theoretical Reading from each Corrected DVM Reading, recording
results in Table 4-16. Maximum value should not exceed
maximum value by 10 to calculate Log Maximum Cumulative Error
PERFORMANCE TESTS
TABLE 4-16. AMPLITUDE LOG DISPLAY ACCURACY
Corrected
Theoretical
D V M
Reading
Reading*
EXAMPLETABLE OF 4-16
Corrected
Theoretical
D V M
Reading
Reading*
Theoretical
Reading Subtracted
From Corrected
D V M Reading
Theoretical
Reading Subtracted
From Corrected
D V M Reading
15 mV, corresponding to
(in dB).
dB Log Maximum Cumulative Error
MODEL 8559A
Difference
Between
Adjacent
Readings
Difference
Between
Adjacent
Readings
1.5 dB. Divide